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| author | Yu Watanabe <watanabe.yu+github@gmail.com> | 2023-03-21 10:05:33 +0900 |
|---|---|---|
| committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2023-03-29 10:34:41 +0900 |
| commit | ef9c12b157a50d63e8a8eb710c013d16c2cea319 (patch) | |
| tree | 62406cd13da67e6aadd80b2fad3bf2b5d31aa313 /src/cgls | |
| parent | dd2d3e975e80f5ae3b64bd9c2b63d866415c764e (diff) | |
| download | systemd-ef9c12b157a50d63e8a8eb710c013d16c2cea319.tar.gz | |
tree-wide: reset optind to 0 when GNU extensions in optstring are used
Otherwise, if getopt() and friends are used before parse_argv(), then
the GNU extensions may be ignored.
This should not change any behavior at least now, as we usually use
getopt_long() only once per invocation. But in the next commit,
getopt_long() will be used for other arrays, hence this change will
become necessary.
Diffstat (limited to 'src/cgls')
| -rw-r--r-- | src/cgls/cgls.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cgls/cgls.c b/src/cgls/cgls.c index 32780c606a..a34b0aa604 100644 --- a/src/cgls/cgls.c +++ b/src/cgls/cgls.c @@ -93,6 +93,9 @@ static int parse_argv(int argc, char *argv[]) { assert(argc >= 1); assert(argv); + /* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long() + * that checks for GNU extensions in optstring ('-' or '+' at the beginning). */ + optind = 0; while ((c = getopt_long(argc, argv, "-hkalM:u::xc", options, NULL)) >= 0) switch (c) { |